LED light fixture

Abstract

Light fixtures for illuminating spaces that use light emitting diode-based light sources and that incorporate chip on board technology that enables the light emitting diode to be mounted directly on a portion of the light fixture. In some embodiments, the light fixture includes a reflector assembly onto which the light emitting diode is directly mounted. In other embodiments, the reflector assembly includes an aperture that receives a board having chip on board technology onto which the light emitting diode is directly mounted. In some embodiments, the light fixture also includes a diffuser for diffusing the light emanating from the light emitting diodes.

We claim: 
     
       1. A light fixture for illuminating an architectural space comprising:
 (a) a housing comprising a housing cavity; 
 (b) a heat dissipater having an underside comprising at least one mounting surface, wherein the heat dissipater is positioned within the housing cavity such that the at least one mounting surface is recessed entirely within the housing cavity; 
 (c) a plurality of light emitting diodes mounted directly onto the at least one mounting surface without a printed circuit board interposed between the plurality of light emitting diodes and the at least one mounting surface, wherein the plurality of light emitting diodes are recessed entirely within the housing cavity; and 
 (d) traces printed on the at least one mounting surface to electrically interconnect the plurality of light emitting diodes. 
 
     
     
       2. The light fixture of  claim 1 , wherein the heat dissipater further comprises at least one pair of curved reflective surfaces, wherein the at least one mounting surface is interposed between the curved reflective surfaces of the at least one pair of curved reflective surfaces and wherein the curved reflective surfaces of the at least one pair of curved reflective surfaces extend from the at least one mounting surface in a direction toward the architectural space to an extent beyond the plurality of light emitting diodes so as to be positioned to receive and reflect light emitted by the plurality of light emitting diodes. 
     
     
       3. The light fixture of  claim 1 , wherein at least one of the plurality of light emitting diodes further comprises a lens comprising a phosphor-infused polymer. 
     
     
       4. The light fixture of  claim 1 , wherein the housing further comprises opposing end walls separated by a distance and opposing side walls separated by a distance, wherein the opposing end walls and the opposing side walls define the housing cavity such that the housing cavity extends entirely across the distance between the opposing end walls and the distance between the opposing side walls. 
     
     
       5. The light fixture of  claim 4 , wherein the heat dissipater extends continuously and entirely across the distance between the opposing side walls and the distance between the opposing end walls. 
     
     
       6. The light fixture of  claim 2 , wherein the at least one mounting surface comprises an elongated channel near an upper portion of the housing. 
     
     
       7. The light fixture of  claim 2 , wherein the curved reflective surfaces of the at least one pair of curved reflective surfaces extend within the housing cavity parallel to the at least one mounting surface and wherein the curved reflective surfaces of the at least one pair of curved reflective surfaces curve downwardly from the at least one mounting surface towards a bottom portion of the housing. 
     
     
       8. The light fixture of  claim 2 , wherein the at least one pair of curved reflective surfaces is formed integrally with the at least one mounting surface. 
     
     
       9. The light fixture of  claim 2 , wherein the at least one pair of curved reflective surfaces is recessed entirely within the housing cavity. 
     
     
       10. The light fixture of  claim 6 , wherein:
 the at least one mounting surface comprises a first mounting surface and a second mounting surface that extends within the housing cavity parallel to the first mounting surface; 
 the at least one pair of curved reflective surfaces comprise a first pair of curved reflective surfaces and a second pair of curved reflective surfaces; and 
 the first mounting surface is interposed between the reflective surfaces of the first pair of curved reflective surfaces and the second mounting surface is interposed between the curved reflective surfaces of the second pair of curved reflective surfaces. 
 
     
     
       11. The light fixture of  claim 10 , wherein a central portion of the heat dissipater comprises a crest where an edge of one of the curved reflective surfaces of the first pair of curved reflective surfaces meets an edge of one of the curved reflective surfaces of the second pair of curved reflective surfaces. 
     
     
       12. A method of manufacturing a light fixture, the method comprising:
 (a) providing a light fixture comprising:
 (i) a housing comprising a housing cavity; and 
 (ii) a heat dissipater having an underside comprising at least one mounting surface, wherein the heat dissipater is positioned within the housing cavity such that the at least one mounting surface is recessed entirely within the housing cavity; and 
 
 (b) directly attaching a plurality of light emitting diodes onto the at least one mounting surface without a printed circuit board interposed between the plurality of light emitting diodes and the at least one mounting surface such that the plurality of light emitting diodes are recessed entirely within the housing cavity. 
 
     
     
       13. The method of manufacturing a light fixture of  claim 12 , wherein:
 the at least one mounting surface comprises a first mounting surface and a second mounting surface that extends within the housing cavity parallel to the first mounting surface; 
 the heat dissipater further comprises a first pair of curved reflective surfaces and a second pair of curved reflective surfaces; and 
 the first mounting surface is interposed between the curved reflective surfaces of the first pair of curved reflective surfaces and the second mounting surface is interposed between the curved reflective surfaces of the second pair of curved reflective surfaces. 
 
     
     
       14. The method of manufacturing a light fixture of  claim 12 , further comprising printing traces directly on the at least one mounting surface to electrically interconnect the plurality of light emitting diodes. 
     
     
       15. The method of manufacturing a light fixture of  claim 12 , wherein the heat dissipater further comprises at least one pair of curved reflective surfaces, wherein the at least one mounting surface is interposed between the curved reflective surfaces of the at least one pair of curved reflective surfaces and wherein the curved reflective surfaces of the at least one pair of curved reflective surfaces extend from the at least one mounting surface beyond the plurality of light emitting diodes so as to be positioned to receive and reflect light emitted by the plurality of light emitting diodes. 
     
     
       16. The method of manufacturing a light fixture of  claim 12 , wherein the housing further comprises opposing end walls separated by a distance and opposing side walls separated by a distance, wherein the opposing end walls and the opposing side walls define the housing cavity such that the housing cavity extends the distance between the opposing end walls and the distance between the opposing side walls. 
     
     
       17. The method of manufacturing a light fixture of  claim 15 , wherein the at least one pair of curved reflective surfaces is formed integrally with the at least one mounting surface. 
     
     
       18. The method of manufacturing a light fixture of  claim 15 , wherein the at least one pair of curved reflective surfaces is recessed entirely within the housing cavity. 
     
     
       19. The light fixture of  claim 16 , wherein the heat dissipater extends continuously and entirely across the distance between the opposing side walls and the distance between the opposing end walls. 
     
     
       20. A light fixture for illuminating an architectural space comprising:
 (a) a housing comprising an upper portion, a lower portion, and a housing cavity having an opening proximate the lower portion; 
 (b) a heat dissipater positioned within the housing cavity, the heat dissipater comprising at least one mounting surface, a first curved reflective surface extending from a first side of the at least one mounting surface, and a second curved reflective surface extending from a second side of the at least one mounting surface opposite the first side, wherein:
 i. the at least one mounting surface, the first curved reflective surface and the second curved reflective surface are positioned entirely within the housing cavity; 
 ii. the at least one mounting surface is positioned more proximate the upper portion of the housing than the first and second curved reflective surfaces; and 
 iii. the first and second curved reflective surfaces extend from the at least one mounting surface towards the lower portion of the housing; 
 
 (c) a plurality of light emitting diodes mounted directly onto the at least one mounting surface without a printed circuit board interposed between the plurality of light emitting diodes and the at least one mounting surface, wherein the plurality of light emitting diodes are recessed entirely within the housing cavity and wherein the first and second curved reflective surfaces extend from the at least one mounting surface in a direction toward the architectural space to an extent beyond the plurality of light emitting diodes so as to be positioned to receive and reflect light emitted by the plurality of light emitting diodes; and 
 (d) traces printed on the at least one mounting surface to electrically interconnect the plurality of light emitting diodes.